Separable attachment fixture



May 2'? 1924 R. B. BENJAMIN SEPARABLE ATTACHMENT FIXTURE Filed March 31. 19.20

III

Q4110? 1.2 e ys.

UNITED 1,495,153 PATENT REUBEN B. BENJAMIN, OF CHICAGO, ILLINOIS, .A SSIG'NOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SEPARABLE ATTACHMENT FIXTURE. I

Application filed March 31, 1920. Serial No. 370,145.

To all whom it may concern:

Be it known that I, REUBEN B. BENJA- MIN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Sepa-rable Attachment Fixtures, of which the following is a full,-

clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

Iy invention relates to separable attachment devices, having particular relation to devices of the character designated, wherein a receptacle member and a cap cooperat- 16 ing therewith are utilized, and has forits object to provide a' cap portion comprising contact fingers so formed and-disposed, that they may pass through very restricted openings in the receptacle member of the device 20 and yet admit of a sharp angular break between the cap and receptacle member when desired.

For a better understanding of my invention reference may be had to the accompanying drawings, in which: I

Fig. 1 is an elevational sectional view of an attachment plug embodying my invention;

a Fig. 2 is 'a plan view of the cap portion of said device illustrating the manner in which the binding terminals are disposed with res ect to the aperture therein and the contact gers;' Figs, 3 and dare elevational views, partially in section, illustrating the manner in which the contact finger associated with the cap functions when the cap and plug portions are separated by a sharp angular break, the two views'being taken at right 40 angles to each other; and,

Figs. 5 and 6 illustrate in detail specific features of the contact finger construction which I employ. I

In order to adequately protect the contact '45 engagin clips which are associated with the receptac e members of devices of the aboveindicated character, it is essential that the openings afi'ording ingress to said cli s be made as small as possible and yet adinlt the 0 cooperating contact fingers which are attached to the cap portion. Again, it is essential that the various contact portions of the receptacle portion and ca be' so arranged and the openings afi'or ing ingress to the receptacle recesses be of such size that the two portions of the device may be angularly separated, it being obvious that in the usual employment of attachment devices of the above character the break between the two portions thereof is angularly efl'ected most of the time.

In the past various means have been suggested to provide for the above contingencies, such for instance, as the provision of relatively short-contact fingers whereby, when an angular break is effected, the fingers will not rub too severely against the sides of the restricted openings provided in the receptacle portion, The employment of the above and other expedients have not, however, entirely solved the problem inasmuch as the contact finger which has been heretofore employed is not adapted for an an ular break in that it does not possess a su cient resiliency and therefore when an angular break is effected undesirable contact between the edges of the receptacle openings and the con tact finger is unavoidable.

I propose to eliminate the above-mentioned difficulties by providing a cap portion embodying contact fingers .having an extreme degree of resiliency. I accomplish this end by making the contact fingers double-ply, or in the manner of a double-leaf spring. Moreover, I so dispose the aforesaid resilie'nt contact fingers that they admit of a sharp angular break by reason of their resiliency. Finally I provide a stiffening member/which is interposed between thetwo portions of the contact finger to support the same.

Referring now to the accompanying drawings, the separable attachment device shown comprises a socket engaging plug 1 and a cooperating cap'portion 2. The plug 1 is provided with conventional shell and center contacts 3 and 4, respectively, an engaging clip 5 being connected to the shell contact 3 and a simi r clip 6 being connected to the center contact 4, said clips being fllSPOSGd in recesses 7 and 8, respectively. The base of the plug 1 is provided with openings 9 and 10, respectively, whereby ingress may be had to the recesses 7 and 8. i

The cap portion 2 is apertured at 12 whereby wires may be attached to binding posts 13 and 14 positioned adjacent to said aperture. The binding plates 15 (Fig. 5) are (provided at one end thereof with upwar ly extendin lugs 16 and have tapped holes atone en for the binding screws. 110

whole, riveted to the cap, as shown.

The portion 22 in the clips 16 at the other end of the mem-. bers 15 is interposed between two leaves 17 and 18 of a double-ply contact finger, 19, (Fig. 6) said leaves having a substantial l..-

shape, and being provided 'on their shorter legs with holes whereby the member 15 may be secured thereto, and the member, a5 a ne leaf, here shown as 18, is bulged at 20 to increase the resiliency and promote other de sirable results.

As more clearly shown in Fig. 1 the portion 16functions to stifl'en and separate the leaves of the contact fingers 19 and it will moreover be observed that this portion extends upwardly to approximately the plane of the abutting faces of the plug and cap portions. I

Referring further to Figs. 1 and 2, the relationship between the restricted openings 9 and 10 and the cross. sectional area of the contact fingers 19 will be apparent, and as shown therein, the clearance is quite small. The extreme resiliency of the double-ply contact fingers, however, admits of a considerable angular" break as shown in Figs. 3 and 4. r Referring more specifically to Fig. 4:, which is a view taken at right anglesrto the view in Fig. 3, the inanner-of effecting an angular break in a direction at right angles to the direction assumed in Fig. 3 is illustrated. Furthermore, by reference to this figure and Figure 5, the formation of the contact fingers in a lateral direction is apparent. n

Projections 21- and projection receiving recesses 22are provided in connection with the clips-5 and 6, while a projection 23 is formed on the contact finger 19, the latter being adapted to cooperate with the recesses 6 and7. The projections 21 portion which extends difierent type of cap from that here shown, contact blades.

While I have shown but one embodiment of my modifications therein may occur to those skilled in the art, and I desire, therefore, that my invention be limited only by the showing of the prior art or by;the scope of the appended claims.

Having thus described my invention, what I claim. as new and desire to secure by Letters aPatent is:

1. In a separable attachment fixture, a cap embodying an insulating base provided with a wiring aperture, integral contact fininvention, it is apparent that many gers for engaglng the contacts of a receptacle member, said fingers embodying L-shaped leaf springs, binding posts disposed adjacent said aperture, and a conducting member extendingfrom said binding posts to said finger and provided with an L-shaped portion which extends upwardly between the leaves of said finger and constitutes a stiffening member therefor. v

2.1n a separable attachment fixture, a cap embodying an insulating base provided with a-w'iringaperture, integral contact fingers for engaging the contacts of a receptacle member, said fingers embodying L-shaped leaf-springs, binding posts disposed adjacent said aperture, and a conducting member extending from said binding posts to said finger and provided upwardly between the leaves of said finger to substantially the plane of the abutting faces of said cap and. said receptacle member and constitutes a stiffening member therefor.

with an L-shaped scribed my name.

REUBEN BQB NJA IN. 

